<!DOCTYPE html>
<html lang="en">

<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Document</title>
	<style>
		.container {
			display: flex;
			justify-content: center;
		}

		.box {
			width: 100px;
			height: 100px;
			background-color: lightblue;
			margin: 5px;
		}
	</style>
</head>

<body>
	<div class="container">
		<div class="box">1</div>
		<div class="box">2</div>
		<div class="box">3</div>
	</div>
</body>

</html>